The word "into" is a preposition that indicates movement or direction towards the inside of something. There are several synonyms for this word, each with different connotations. For example, "toward" implies a direction of movement, while "inside" refers to a physical location. Other synonyms for "into" include "within", "through", "amid", "among", "inside of", "down to", "within the confines of", and "in the direction of". Using different synonyms for "into" can help vary your writing, and add more descriptive language to your work.